Rotary disk.



PATENTED OCT. 80, 1908 M. MITCHELL. ROTARYD ISK.

APPLICATION FILED IEB,10,1906.

' MELVIN MITCHELL, OF PEORIA, ILLINOIS.

ROTARY DISK- Specification of Letters Patent.

Patented Oct. 30 1906.

Application filed February 10, 1906- Serial No. 300,504-

To all whom it may concern:

Be it known that I, MELVIN MITCHELL, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois', have invented new and useful Improvements in Rotary Disks, of which the following is a specification.

This invention relates to bearings for rotary disks, such as are used on grain-drills, seeding-machines, plows, and the like.

i As is well known to those skilled in the art to which this invention relates, only the lower edge of the rotary furrow-disk projects into the ground. For this reason the pressure upon the disk is uneven and causes a twisting strain upon the axle or journal on which the disk is mounted, so that said axle soon becomes worn and permits the disk to play or wabble thereon.

The object of the present invention is'to improve the construction of the journal and the clamping-disks by which the furrow-disk is held in place in such manner that the uneven strain upon the furrow-disk will be prevented from wearing upon the axle, and thus causing the disk to wabble.

With the foregoing and other minor objects in View, which will appear as the description proceeds, the invention resides in a cylindrical journal having an integral double frusto-conical head and frusto-conical clamping-disks, each having a frusto-conical depression to receive part of the journalhead, said clamping-disks serving to hold the furrow-disk.

The invention also resides in the provision of novel means for automatically lubricating the journal by forming in the double frustoconical head an annular oil-chamber adapted to receive asolid lubricant and a liquid lubricant, whereby after the li uid lubricant has been exhausted and the ournal begins to heat as the result of friction the solid lubricant will be melted gradually and will thus serve to lubricate the bearing for an 'extended period of time.

Furthermore, the invention resides in the particular combination and arrangement of parts and in the precise details of construction hereinafter described and claimed as a practical embodiment thereof.

In the accompanying drawings, Figure 1 is 'a vertical section through a bearing constructed in accordance with the invention. Fig. 2 is an elevation of one of the frustoconical clamping-disks. Fig. 3 is a similar Wabble thereon.

view of the journal with its double frustoconical head.

Like reference-numerals indicate like parts in the different views. 1

The cylindrical journal 1 is formed with a longitudinal bore 2, by means of which it may be bolted in any suitable manner upon the draw-bar, grain-boot, or other suitable element of the plow, grain-drill, or seeding-machine by means of any convenient form of bolt, (not shown,) those skilled in the art to which the invention relates. Formed upon the cylindrical journal 1 and preferabl integral therewith is a double frusto-conica head 3, in the outer end of which is formed an annular oil-chamber 4. A frusto-conical clamping-disk 5, formed with a frusto-conical depression-6, is fitted upon the double frusto-conical head 3, the depression 6 in said clamping-disk receiving part of the head 3, as shown. Asimilar frusto-conical clamping-disk 7, formed with a frusto-conical depression 8, is fitted upon the opposite side of said head 3, as shown, the depression 8 receiving part of said head. The disk 7 is fitted around the cylindrical journal 1 and head 3, as shown, and is formed with a tubular extension 9, which, as shown, surrounds the journal 1 and is concentrically removed therefrom to form an annular recess to receive a washer 10,

which serves to prevent the entrance of dirt to the bearing. Formed in the disk 5 is an oil-perforation 11, which is closed normally by a screw-plug 12. The furrow-disk 13 is clamped between the disks 5 and 7 by means of bolts or rivets 14, as shown, said disks 5 and 7' being formed on their meeting faces with annular shoulders 15 to form a seat for said furrow-disk 13.

By means of the construction illustrated and described the uneven pressure upon the furrow-disk 13, due to the fact that only the lower portion of said disk extends into the ground, is received by the double frusto-conical head 3 of the journal, and therefore said journal is prevented from becoming rapidly worn, and thus permitting the furrow-disk to Furthermore, the annular oil-chamber 4 is adapted to receive a quantity of solid lubricant and a quantity of liquid lubricant, whereby in the event that the device is used without being properly oiled whenever necessary the liquid lubricant Will be consumed first, and after it has become exhausted the heat generated in the head 3 as will be understood by by the friction of the unoiled bearing will cause the solid lubricant to melt gradually, thus automatically lubricating the bearing for an extended period of time.

Having thus fully described the invention, What is claimed as new is- 1. In a bearing for rotary disks, a journal having a double frusto-conioal head formed in its outer end with an annular oil-chamber, a clamping-disk fitted upon the head and closing the oil-chamber, said clamping-disk having a frusto-conical depression to receive a portion of the head, a clamping-disk fitted upon the opposite side of the head and having a frustoconical depression to receive a portion thereof, and a furrow-disk held by said clamping-disks.

2. In a bearing for rotary disks, a cylindrical journal having an integral double frusto-conical head formed in its outer end with an annular oil-chamber, a pair of frustoconical clamping-disks fitted upon the head and each having a frusto-conical depression to receive a portion of said head, one of said disks closing the oil-cha1nber and having an oil-perforation therein, and the other of said disks having a tubular extension surrounding the journal and concentrically removed therefrom, a washer located between the tubular extension and the journal, an annular shoulder on each of the clamping-disks, and afurrow-disk located between said clamping-disks and resting against the annular shoulders thereof.

Intestimony whereof I iLfllX my signature in presence of two witnesses.

MELVIN Witnesses:

L. F. MEEK, JOHN M. HERGET.

MITCHELL. 

